I have a class that uses an Expandbar in order to show some values.
I need to be able to use this class again as a value, but I cant find
a way that the items of the second Expandbar are layoutet as I want.

In my example code:

How can I make "Item 1" being sized "the right way" (not being scrolled)
after it was expanded? (Resize the shell after "Item 1" was expanded
and you see what I mean.)